[lld] [LLD][COFF] Implement support for hybrid IAT on ARM64X (PR #124189)

[Martin Storsjö via llvm-commits]

https://github.com/mstorsjo approved this pull request.

LGTM now, thanks! Just one minor comment wording nit.

With the additional comments I think this is clearer now (although as I did manage to understand it now, the previous version of it also felt more understandable now - it's hard to recreate the previous "trying to understand it from scratch" state).

https://github.com/llvm/llvm-project/pull/124189